Incandescent lamp.



R. H. HENDERSON. INOANDESGENT LAMP.

APPLICATION FILED FEB. 3, 1911.

1,075,475. Patented 0011.14, 1913.

Fig.1.

WITNESSES: Q 5 M lfiVENTOR 4%59ZMy I T'TR' rinnnnasoaa'cr ensues, nr'wcensus", ASSIGNOR To vvnsriivs- EQUSIE Like/l3? COM?AI IY, 3.CQBEQEATIQN OF PENIISYLVANIA.

IITCANEESCENT LAMP.

Specification of letters fPatenc.

Patented 9c ii, 191%.

Application filed February 3, 1911. Serial Ilo. 606,428.

ToaZZ whom ii may concern Be it known that 1, ROBERT HENDER- eon acitizen of the United States, and a resident East Grange, in the countyof Essex and State of New Jersey, have invented a newand usefulImprovement in lncandescent Lamps, of which the following is aspecification.

My invention relates to electric incandescent lamps, and particularly tosupporting means for the filaments thereof.

The object of my invention is to provide a support for lamp filaments,and a method applying filaments thereto, .WllElBbj lamps may be moreexpeditiously and eco:

nomically manufactured and the proper relotions between the filament andthe support may be more readily obtained than with structures andmethods heretofore providcd.

in electric incandescent lamps having tungsten or other metallicfilaments, the :i'ilaments are usually bent around and sup ported byanchor Wires having hooks at their ends to receive the same. In themanufacture of such lamps the Winding of the filaments upon theJsupportsnaturally results in a close engagement between the filaments and theanchors and the subjec- -tion of the filaments to tension and theanchors to a bending strain, all of which it is desirable to modify andrelieve before "sill the completion of the lamps. In fact, it is usuallydesirable to provide for a coinparatively free and loose support of thefilament, and to that end it has heretofore been customary to give theanchor Wires a permanent set by bending after the applica tion of thefilament thereto. This is obviously a delicate operation to perform andone'that is attended with no small degree of danger of breakage of thefilament. hloreover, it is diilicult toobtain uniformity in theadjustment of the anchors with respect to the filaments. The anchor andniethod'of the present invent-lei avoid the necessity of bending orotherwise adjusting the anchors after the filament is applied andresults uniformity of the relations of the filament to its supports aswell as in a material lessening of breakage and expense in manufacture.

I In Figure 1 of the accompanying drawing, which illustrates, inperspective. the internal parts of a partially completed lamp embodyingmy invent-ion a filament 1 is bent back and forth around a plurality ofanchors or supports 2 that project laterfllbfflOln a central arbor 'lneanchor Wires at one or both ends of the lamp, though preferably only atthe end remote from the leading-in wires, are bent to pro vide hooksnear their free ends for the reception of the filament,and the endportions thereof beyond the hooks are initially bent backwardly acrossthe open portions of the hooks to provide guards around which thefilament is Wound during its application to the anchors. The filamentmay be Wound freely and rapidly around the guard portions of the anchorsWithout regard for the final relation which the filament and anchorsshould bear to each other. After the filament has been completelyapplied to the supports-the guards are severed from the remainingportions of the anchors, leaving the filament occupying the openportions of the hooks and only loosely engaged thereby. Thus, in thecompleted lamp the filament is loosely supported by the anchor wires,and the'depgree of loosencss is the same between the filament and all ofits supports. The former delicate operation of adjusting the supports tosecure this looseness is also avoided, and lamps may be expeditiouslyand economically manufactured.

Fig.2 Sl'lOiYS a modification of the anchor of Fig. l, the end portionof the anchor Wire extending only partly across the open portion of thehook, but providing a sufiicient support for the filament during theoperation of winding.

Many other modifications may obviously be made Within the spirit andscope of the invention, and I intend that all such should be includedWithin the scope of the appended claim.

I claim as my invention:

The method of manufacturing an incandescent lamp which consists inapplying a filament to a support having a hook to re- 5 (:eive thefilament and agtlard for the hook, and. then removing the guard.

In testimony whereof, I have hemunto subscribed my namethis 18th (iay ofJamimy 1911,

ROBERT H. HENDERSQN.

Witnesses:

GEORGE P. SGHOLL, CHARIEfi E. KELLY.

